Course web site www.clas.ufl.edu/users/mcmack/2008.

Slides:

Advertisements

Similar presentations

Early Origins Chapter 19.1 & 19.3.

Advertisements

Origin and Evolution of Life in the Oceans

3.3 Chemical Compounds in Cells

Evolutionary History Chapter 20. Before life…  Chemical evolution:  The formation of small organic molecules preceded larger ones  Larger, more complex.

Evolution V: Macroevolution & the Origin of Life AP Biology.

 Current theory about how life on Earth began.  Earth formed about 4.6 billion years ago.  Earth was too hot and still being bombarded by meteors,

17-2 Earth’s Early History

Early Earth. Earth formed 4.6 billion years ago oldest fossil organisms - prokaryotes dating back to 3.5 bya earliest prokaryotic cells lived in dense.

Chapter 4: From Chemistry to Energy to Life

Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Origin of Life In 1862, Louis Pasteur conducted experiments that rejected the.

The History of Life Chapter 14. Early Earth Was inhospitable! Very hot due to: Meteoric impact Volcanic eruptions Radioactive decay Early atmosphere contained:

Primordial Earth Theories on the Origin of Life. Early Earth and Evolution A THEORY of the origins of the universe Big Bang When? -Approx Billion.

AP Biology Origin of Life “…sparked by just the right combination of physical events & chemical processes…”

Aim: How do scientists explain the development of life on earth?

Macroevolution The Beginning… / Scientists have tried to figure out the initial conditions and events that may have resulted in the origin of life, however,

AP Biology The History of Life “…sparked by just the right combination of physical events & chemical processes…”

AP Biology Chapter 26. Origin of Life. AP Biology The historical tree of life can be documented with evidence. The Origin of Life.

Ch 25 ~ History of Life on Earth

The History of Life on Earth Chapter 25. Question How have events in the Earth’s history contributed to life as we know it?

The History of Life on Earth

The History of Life An Introduction to Biological Diversity.

The History of Life 14.1 Fossil Evidence of Change Land Environments The History of Life Chapter 14  Earth formed about 4.6 billion years ago.  Gravity.

Similarities and Differences Among Living Organisms.

Early Earth Conditions. Origin of Life Beliefs 1. Spontaneous Generation- idea that nonliving material can produce life ex. People believed decaying meat.

The History of Life…in 1 Lecture

Intro to the History of Life Age of the Earth = 4.6 billion years Oldest fossils = 3.5 billion years –Prokaryotic type structures similar to spherical.

The History of Life Chapter 14. Early Earth Was inhospitable! Very hot due to: Meteoric impact Volcanic eruptions Radioactive decay Early atmosphere contained:

HOW CELLS FUNCTION ALL CELLS NEED ENERGY AND MATERIALS FOR LIFE PROCESSES.

“…sparked by just the right combination of physical events & chemical processes…” Origin of Life.

THE HISTORY OF LIFE ON EARTH PART 1 UNIVERSE TO EUKARYOTES.

AP Biology Origin of Life “…sparked by just the right combination of physical events & chemical processes…”

Discover Activity: What is a Compound?

Big Ideas from Chapter billion years in Earth’s history Much change has taken place Abiotic --> Life Many changes in the abiotic environment.

A. Formation Of The Earth About billion years ago, the solar system was a mass of swirling gas and dust. - Possibly the result of a supernova. I. HOW.

How Did Life Begin? I. ________________ were the first to evolve A. ______ billion year old _____________ fossils have been found 1. ____________.

EARTH & SPACE Astronomical Phenomena Origins of life Extinctions & Fossils.

Four Needs of Living Things 1. Four needs of living things. 1. water 2. air 3. place to live 4. food.

Origin of Life. The Earth was around for 1 billion years before we see signs of LIFE…. So…where did it come from?

1. Name the two Types of Cells ProkaryoticProkaryotic EukaryoticEukaryotic.

Warm-Up 1.Answer the following using the diagram below: a.a common ancestor for D & F b.most closely related species c.least related species d.new species.

I. What was it like on early Earth ? Very hot Meteorites colliding into earth Frequent volcanic activity Atmosphere with little oxygen & lots of nitrogen.

History of the Earth. Early Earth 4.6 bya VERY HOT (colliding meteorites, erupting volcanoes) Atmosphere was mostly nitrogen, carbon dioxide, water vapor,

Chapter 1.  Element – a substance that cannot be broken down into simpler substances – smallest unit of an element is an atom  Compound – two or more.

History of Life Chapter 26. What you need to know! The age of the Earth and when prokaryotic and eukaryotic life emerged. Characteristics of the early.

Origins and History of Life. Origin of Life Hypothesis of today: inorganic molecules in Earth’s prebiotic oceans combined to produce organic molecules.

The History of Life on Earth

How life emerged…..   Emerging from Volcanoes, gases such as Ammonia, Methane, Water vapor, and Hydrogen were released into atmosphere.  Earth started.

Origin of Life “…sparked by just the right combination of physical events & chemical processes…”

Chapter 25 ~ The History of Life on Earth “…sparked by just the right combination of physical events & chemical processes…”

Aim #73: How do scientists explain the development of life on earth?

The History of Life on Earth

History of Invertebrates

Ch. 25/26 Warm-Up Answer the following using the diagram below:

The History of Life on Earth

There’s something you need to know…

The origin of living systems is explained by natural processes.

History of Life on Earth

Origins of Life AP Biology.

Ch. 25/26 Warm-Up Answer the following using the diagram below:

Ch. 25/26 Warm-Up Answer the following using the diagram below:

Evolution-Change Through Time

How Life Began Wake County Biology Curriculum.

Ch. 25/26 Warm-Up Answer the following using the diagram below:

Broad patterns of evolution

Ch. 25/26 Warm-Up Answer the following using the diagram below:

Notes #6: Geologic Timescale

Ch. 25/26 Warm-Up Answer the following using the diagram below:

Ch. 25/26 Warm-Up Answer the following using the diagram below:

19.1 How Did Life Begin? I. Bacteria were the first to evolve

Presentation transcript:

Course web site

Module 1: Evolution MonthDayTopic Aug28History of life on Earth 30Timeline construction Sept1Theory of evolution 4Holiday 6Evidence for evolution 8Mechanisms of evolution I 11Mechanisms of evolution II 13Speciation

Outline 1.What is life? 2.How might it have arisen? 3.What has happened since then?

Time Cosmological Geological Evolutionary Ecological Physiological

4.5 billion years ago, the earth was born

Life is...what?

Life shares Chemical composition – CHON(SP) Carbon Hydrogen Oxygen Nitrogen Sulfur Phosphorus Iron, Zinc, Calcium, Sodium...

Life shares Biochemistry in liquid water –Proteins –Lipids –Carbohydrates –Nucleic acids

Life shares Use of matter and energy –Energy stored and released by breaking chemical bonds –Autotrophs –Heterotrophs –Metabolism –Enzymes –Homeostasis

Life shares Cells –Membranes –Cytoplasm –Organelles –Nucleus A prokaryote cell...

Life shares Reproduction –Heredity –Variation

Life shares Ecology!!!!!

Life shares... 1.Chemical composition-CHON(SP) 2.Biochemistry 3.Use of matter and energy 4.Cells 5.Reproduction 6.Ecology

How did life start?

Causal mechanism

The biogenesis paradox Life arises from life... But what about the first organisms?

How did life start? In a very different earth environment –Reducing atmosphere—No O 2 ! –Lots of H 2 O –Lightening, volcanoes, ultraviolet rays

The primordial soup hypothesis 1.Abiotic synthesis of simple organic molecules

The primordial soup hypothesis 1.Abiotic synthesis of simple organic molecules 2....complex organic molecules

The primordial soup hypothesis 1.Abiotic synthesis of simple organic molecules 2....complex organic molecules 3.Origin of self-replicating molecules

The primordial soup hypothesis 1.Abiotic synthesis of simple organic molecules 2....complex organic molecules 3.Origin of self-replicating molecules 4.Formation of pre-cells

The big leap From pre-cells to life... Lots of time for natural selection

Life first appears in the fossil record about 3.8 billion years ago

Changes on Earth that have shaped life… Atmosphere (O 2, UV) Continental drift Climate Volcanoes Extraterrestrial bombardment

History has been punctuated by mass extinctions

1 st mass extinction 440 mya: ~75% of species disappear Sudden global cooling? Predatory arthropod

2 nd mass extinction 370 mya: ~75% of species disappear Continental collision or global climate change?

3 rd mass extinction 245 mya: ~96% of species disappear The greatest event of all time! Extraterrestrial impact?

4 th mass extinction 210 mya: ~65% of species 5 th mass extinction 65 mya: ~76% of species Extraterrestrial impact or volcanism?

The 6 th mass extinction... Last 10,000 years –30% of earth’s species gone by year 2100